Improvement in pumps



T. B. SWAN. Pump.

No. 213,005. Paten ted Mar. 4, 1879.

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THOMAS 13. SWAN, OF MECHANICS FALLS, MAINE.

IMPROVEMENT IN PUMPS.

' Specification forming part of Letters Patent No. 213,005, dated March 4, 1879; application filed January 18, 1879.

To all whom it may concern Be it known that I, THOMAS B. SWAN, of Mechanics Falls, in the county of Andros coggin and State of Maine, have invented a new and valuable Improvement in Pumps;

and I do hereby declare that the following is combination, with a pump-barrel having a narrowed portion above the spout, a valved plunger working in the barrel below said spout, a solid piston working in the narrowed portion aforesaid, and a rod connecting the plunger and piston, of aventilating-tube extending alongside the pump through the wellcover, and a passage above the piston leading into said tube, as hereinafter shown and described.

In the annexed drawings, the letter A desi gnates an ordinarypump-barrel, having a supply-pipe, B,cl0sed atits upper end by a valve, (1, opening upward.

Above the spout b the bore of the barrel is reduced in diameter, as shown at 0, usually by means of a sleeve, (1, and above said narrowed portion resumes its original size, as at cl, in order to allow the lever C full play. In that portion of the barrel below the spout is arranged a plunger, 6, having an upwardlyopening valve, 0, and in the reduced portion above the same a solid piston, f, the plunger being connected to the piston by means of a rigid rod, f, and the piston being secured to the lever (l by a connecting-rod, g.

It is evident that if a hose be applied to the spout and the lever vigorously operated,

the pump will force water to a considerablev distance; but as, in pumps of this description, it is very difficult to pack the piston f absolutely tight, the space above said piston soon fills with water and overflows, wetting the well-cover and all adjacent objects. To prevent this, a hole, 2', is out into the wall of the barrel above the sleeve, leading into a venila ting-tube, J, extending along the side of the barrel and through the well-cover. The water then runs back into the well.

About midway between the spout and the end of the barrel, under the well'cover, ahole, t, is cut, through which water runs back into the well when the said hole is open.

On the outside of .the barrel, on a level with the draining-hole t", is rigidly secured a metallic plate, D, in which is a tapering recess, j, extending vertically through it. This recess gradually narrows from above downward, as shown.

J indicates a slide having a tapering foot, 1, adapted to enter the plate D, and provided with a slot, or slots, 8, through which a bolt or bolts are passed into the barrel, thus allowing the slide free endwise movement. The slide J extends upward above the well-cover, and has a handle, by which it is operated. When it is thrust down' the beveled foot enters the socket-plate, and the slide is forced against the side of the barrel, accurately closing the drain-hole t", because of the wedging action thus produced.

Usually the face of the slide adjacent to the barrel will be covered with leather to render the closure air-tight.

By drawing up the slide the foot thereof is partly withdrawn from the wedge-plate, the hole- '5 reopened, and the contents of the barrel drained off into the well.

What I claim as new, and desire to secure by Letters Patent, is

The combination, with a pump-barrel having a narrowed portion above the spout, a valved plunger working in the barrel below said spout, a solid piston working in the nar rowed portion aforesaid, and a rod connecting the plunger and piston, of a ventilating-tube extending alongside the pump through the well-cover, and a passage above the solid piston leading into said tube, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

- THOMAS Bi SWAN.

Witnessesi E. ADRON GAr/nvroN, EDGAR E. BENSON. 

